These are a few links to useful sites.The GCCF site has a host of useful 'cat' information, leaflets and articles on the subjects of pedigree cats, breeding, showing etc.
The RBBA is the 'Breed Club' for Russian Blues within the U.K. and its site is very informative as regards the breed. It also has many links to other 'Russian Sites'.
FAB has a superb range of general cat health information
The Blue Cross is a well known charity catering for cats (amongst many other animals)
The Short-Haired Cat Society is the senior Breed Club for British and Foreign Shorthairs. It was first constituted in 1901 and was a Founder Member of the Governing Council of the Cat Fancy, catering for all the then known Shorthair breeds.